CVE-2020-10123 Auth bypass in SelfServ ATM

Medium 5.3 Published Updated

Attackers with physical access can bypass authentication to dispense cash from NCR SelfServ ATMs by generating valid session keys.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Local or same network only
Victim action needed
Not needed
Fix
None listed

What is CVE-2020-10123?

CVE-2020-10123 is a medium-severity authentication bypass vulnerability in NCR SelfServ ATM, published on 21 Aug 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The currency dispenser of NCR SelfSev ATMs running APTRA XFS 05.01.00 or earlier does not adequately authenticate session key generation requests from the host computer, allowing an attacker with physical access to internal ATM components to issue valid commands to dispense currency by generating a new session key that the attacker knows.

Weakness: CWE-287, CWE-305

Which versions are affected by CVE-2020-10123?

It affects 1 product.

Products include Ncr Aptra Xfs.

How do I fix CVE-2020-10123?

No fix has been published for CVE-2020-10123 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2020-10123 being exploited?

There is no known exploitation of CVE-2020-10123 in the wild and no public exploit code.

Sources

Also known as GHSA-9fqf-7qjx-9m2h.

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